Swimming pool circulation and cleaning system

ABSTRACT

A swimming pool circulation and cleaning system includes a first zone with a plurality of stationary wall inlet nozzles and a second zone with a plurality of pop-up nozzles. The stationary wall inlet nozzles are strategically located in the walls of the swimming pool. Each stationary wall inlet nozzle comprises several tangential openings for directing the forced water flows downwardly towards the pool floor. The pop-up nozzles are strategically located in the pool floor to work in conjunction with the stationary wall inlet nozzles to continue the water flow from the stationary wall inlet nozzles in a direction towards the main pool drain. The pop-up nozzles may be non-rotating or rotating only about 90 degrees. A water recirculation system can be operated to re-circulate and deliver the swimming pool water either sequentially or simultaneously to the stationary wall inlet nozzles and the floor pop-up nozzles.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to U.S. Provisional Patent ApplicationSer. No. 61/464,685, filed Mar. 8, 2011, the disclosure of which isincorporated herein by reference in its entirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a swimming pool circulation and cleaningsystem. More particularly, the invention provides an improved swimmingpool system for circulating the water and for cleaning the water and theswimming pool.

2. Description of Related Art

Swimming pool circulation systems typically consist of water returnlines that return the water to the surface area of the swimming pool.Self-cleaning swimming pool systems have been developed over the yearsutilizing “pop-up” floor heads, whereby the pop-up heads rotate as theyare raised, thereby constantly pushing the water, dirt, and debris inrandom directions, which essentially keeps the dirt and debris insuspension in the water until they are removed by either the poolskimmers or by the main drain of the pool water circulation system.These pop-up floor heads may rotate either 180 degrees or 360 degrees.

U.S. Pat. No. 6,419,840 discloses a cleaning system for swimming pools.The cleaning system has several active drains 30 located on the bottomwall 14 of the swimming pool 10 that cooperate with banks of directionalnozzles 74 mounted in the side walls that direct a flow of water downthe side wall of the swimming pool. The directional nozzles 74 dislodgedebris from the side and bottom walls which is swept toward and receivedby the floor drains 30, thus cleaning the pool. Directional nozzles 74can be employed to direct water across the surface of walls 12 todislodge and remove loose algae, sediment or other debris there from.For some applications, directional nozzles 74 are made to sweepcyclically through an arc of side wall 12 to direct water at pressureover the whole arc. The active floor drains 30 have a grid cover thatadmits larger debris and allows the use of mobile pool cleaners. Theactive floor drains 30 are connected to in-deck, fine mesh canisterfilters to remove medium and large size debris before it reaches thewater pump and the pool filtration system. Stationary cleaning units 72are located in the steps 20 and seat 22 of swimming pool 10. Stationarycleaning units 72 include a housing 80 positioned within the gunite 82of the surface and with a top of housing 80 being flush with an uppersurface thereof. Located within housing 80 is a hollow body 84 havingone or more tangential openings 86 therein. Upon receipt of waterthrough return line 76, body 84 will be forced upwardly by the force ofthe water until a flange 88 engages a portion 90 of housing 80. Waterexiting through tangential openings 86 imparts a rotary motion to body84. A circular water pattern is thus created about head 72 immediatelyadjacent the surface thereabout which will dislodge and force away anydebris or sediment thereon thus cleaning the surface. With anappropriate number of heads 72, a set of steps 20, a seat 22 or the likemay be cleaned.

U.S. Pat. No. 3,045,829 discloses a self-cleaning system designed todirect the flow of water, dirt, and debris down the walls, to the floor,and then along the floor and towards the main drain for removal. Furtherpool cleaning and/or circulating devices, apparatuses, and/or systemsare disclosed in U.S. Pat. Nos. 3,486,623; 3,506,489; 3,521,304;4,114,206; 4,188,673; 4,212,088; 5,135,579; 6,280,639; and 7,344,639 andin U.S. Patent Application Publication No. U.S. 2004/0182427.

A number of these cleaning systems of the prior art require that theflow rate of each nozzle or group of nozzles be uniform or the same.

There is a need to provide an improved swimming pool circulation andcleaning system.

SUMMARY OF THE INVENTION

The invention provides this need. The invention provides an improvedswimming pool system which efficiently circulates the water and whichcleans the water and the swimming pool.

The swimming pool system of the invention comprises two zones. A firstzone, Zone A, comprises a plurality of stationary wall inlet nozzleswhich use re-circulated pool water, and a second zone, Zone B, comprisesa plurality of floor return pop-up nozzles which also use re-circulatedpool water. The stationary wall inlet nozzles of Zone A are generally inalignment relative to each other in a row around the walls of theswimming pool and are directed downwardly toward the bottom of the pool.The floor return pop-up nozzles are generally in alignment relative toeach other in a row along the floor of the swimming pool and aredirected toward the main drain of the swimming pool. In someembodiments, more than one row of stationary wall inlet nozzles of ZoneA and/or more than one row of floor return pop-up nozzles may beprovided. The stationary wall inlet nozzles of Zone A are operated toact as a primary water circulation/re-circulation system, and arestrategically positioned in the walls of the swimming pool. Each ofthese stationary wall inlet nozzles of Zone A comprises a plurality oftangential openings in the lower two quadrants of the nozzle head whenthe stationary wall inlet nozzle is positioned in the wall of theswimming pool for delivering several forced water flows downwardly alongthe wall of the pool and onto the floor of the swimming pool.

With regard to Zone B, the plurality of floor return pop-up nozzles arestrategically positioned in the floor of the pool and work inconjunction with the stationary wall inlet nozzles to continue thedirection of the flow of the water with the dirt and debris towards themain pool drain. These floor return pop-up nozzles differ from those ofthe prior art in that in an embodiment of the invention, these pop-upnozzles are non-rotating. These floor return pop-up nozzles comprise atleast one tangential opening to provide a forced water flow which worksin conjunction with the forced water flows of the nozzles of Zone A toforce the water with the dirt and debris downwardly along the floor ofthe pool in the direction towards the main pool drain. In anotherembodiment of the invention, the floor return pop-up nozzles arerotating nozzles. In this instance, the rotation of the return pop-upnozzles would not be greater than about 90 degrees.

In an embodiment of the invention, the swimming pool system comprises avariable speed pump, which allows the stationary wall nozzles and thefloor return pop-up nozzles to run at their optimal capacity withoutexcess water pressure compared to the pumps used in the circulatingand/or cleaning systems of the prior art. The use of a variable speedpump in the system of the invention not only results in lower waterpressure required to be delivered to the nozzles, but also allows for arelatively lower water flow rate and less electrical energy expendedcompared to the pumps generally used in the swimming pool circulationand cleaning systems of the prior art.

The nozzles of Zones A and B could be operated simultaneously or theycould be operated sequentially. For a sequential operation of thenozzles of Zone A and B, the stationary wall nozzles of Zone A could runabout 75% of the time for a water circulation and cleaning process andthen be discontinued with the pop-up floor return nozzles of Zone B thenbeing operated the last 25% of the time for the water circulation andcleaning process. For a simultaneous operation of the nozzles of Zones Aand B, the stationary wall nozzles of Zone A could run about 100% of thetime for a water circulation and cleaning process with the nozzles ofZone B operating in conjunction with the nozzles of Zone A the last 25%of the time of the process. The nozzles of Zones A and B could both beoperated simultaneously at 100% of the time of the water circulation andcleaning process. Thus, for the water circulation and cleaning processof the invention, several methods for operating the nozzles of Zones Aand B are available. Operation of the nozzles of Zones A and B isaccomplished via a water recirculation system comprising water deliveryconduits connected to the nozzles, a water return conduit connected tothe main drain, at least one variable speed pump, a valve device whichmay be either a water distribution valve or a standard valve, and afilter system.

These and other aspects of the invention will be better appreciated andunderstood when the following description is read in light of theaccompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partly broken away perspective view schematically showing aswimming pool employing the circulation and cleaning system of theinvention.

FIG. 2 is a top view of a stationary wall inlet nozzle of Zone A of thesystem of FIG. 1.

FIG. 3 is an elevation sectional view of the stationary wall inletnozzle of FIG. 2.

FIG. 4 is a top view of a floor return pop-up nozzle of Zone B of thesystem of FIG. 1.

FIG. 5 is a cross sectional view of the floor return pop-up nozzle takenalong lines 5-5 of FIG. 4.

DESCRIPTION OF THE INVENTION

Referring to FIG. 1, swimming pool 10 comprises the swimming poolcirculation and cleaning system of the present invention. The systeminvolves the combination of a first zone, Zone A, which comprises aplurality of stationary wall inlet nozzles 12 for circulating andre-circulating the water, and a second zone, Zone B, which comprises aplurality of floor return pop-up nozzles 20 for circulating andre-circulating the water. Zone A is strategically located in all fourwalls 13 and Zone B is strategically located in floor 16 of swimmingpool 10.

The first zone, Zone A, is intended to be operated to act as the primarycirculation and re-circulation system. Zone A comprises a plurality ofstationary wall inlet nozzles, one of which is shown at referencenumeral 12 in FIGS. 2 and 3. With regard to FIGS. 2 and 3, stationarywall inlet nozzle 12 comprises a hollow head 15, a flange 17 and athreaded body 19 for securely engaging nozzle 12 in a threaded wallfitting (not shown) in wall 13 of swimming pool 10. As shown in FIGS. 2and 3, hollow head 15 comprises a plurality of tangential openings 14 afor delivering a forced flow of water as shown at reference number 14 inFIG. 1. Still referring to FIGS. 2 and 3, each stationary wall inletnozzle 12 further comprises a conduit 21 which extends the entire lengthof threaded body 19 for receiving and delivering a forced flow of waterinto hollow head 15 and out through tangential openings 14 a of hollowhead 15.

In FIG. 2, stationary wall inlet nozzle 12 has six tangential openings14 a arranged in two quadrants of the hollow head 15. When stationarywall inlet nozzle 12 is threaded into its respective threaded fitting inwall 13, flange 17 abuts against wall 13 and stationary wall inletnozzle 12 preferably is positioned so that the tangential openings 14 aare arranged in the lower half or in the lower two quadrants of hollowhead 15 in a fan-like fashion as shown in FIG. 2. In this positioning ofnozzles 12, the forced water flows 14 from tangential openings 14 a aredelivered downwardly alongside wall 13 as shown in FIG. 1 forcirculating the water and for cleaning the water and the pool.

Referring again to FIG. 1, stationary wall inlet nozzles 12 aregenerally arranged in alignment relative to each other in a row aroundall four walls 13 of swimming pool 10 and directed downwardly towardsthe bottom of pool 10; and floor return pop-up nozzles 20 are generallyarranged in alignment relative to each other in a single row directedtowards the main drain 18. Even though two such floor return pop-upnozzles 20 are shown in FIG. 1, it is to be appreciated that additionalfloor return pop-up nozzles 20 may be provided in this single row ofFIG. 1. Also, additional rows of floor return pop-up nozzles 20 may bestrategically provided in floor 16 and constructed and arranged to workin conjunction with the stationary wall inlet nozzles 12 in walls 13 toforce the flow of water with dirt and debris towards and down into maindrain 18 as indicated by the several enlarged arrows pointing away fromthe stationary wall inlet nozzles 12 and toward the main floor drain 18in FIG. 1.

Still referring to FIG. 1, stationary wall inlet nozzles 12 of Zone Aare strategically positioned in all four walls 13 of swimming pool 10.Because stationary wall inlet nozzles 12 are stationary they areconsiderably more economical than the pop-up, rotating head type nozzlesemployed around the walls of a swimming pool in some prior art poolsystems. As disclosed herein above, each stationary wall inlet nozzle 12comprises a plurality of tangential openings 14 a for delivery a forcedwater flow 14.

The benefits of the type and location of stationary wall inlet nozzles12 is three-fold. Firstly, the forced water flow 14 from tangentialopenings 14 a of stationary wall inlet nozzles 12 carries any dirt,debris or sediment with it towards the bottom of swimming pool 10 andultimately toward the main drain 18. Secondly, the forced water flow 14from tangential openings 14 a of stationary wall inlet nozzles 12 forcesand carries the purified water, i.e. pool water which has been processedthrough the filtering system of the invention and which has beenchlorinated, down into the lower portion of swimming pool 10. It iscommon practice to apply chlorine to the water surface area of theswimming pool. This chlorinated water along the water surface isgenerally more susceptible to dissipation due to exposure to sunlightand other natural elements, such as wind. In the invention, the forcedwater flows 14 from tangential openings 14 a of stationary wall inletnozzles 12 force and carry the chlorinated water existing along thesurface of the water down into the pool, thereby extending thechlorination effect of the swimming pool water. Thirdly, it is a naturalphenomenon that heat rises. Heated water along the water surface of theswimming pool is more readily dissipated by the weather conditions, suchas evaporation and/or wind. In the invention, the forced water flows 14from the tangential openings 14 a of stationary wall inlet nozzles 12force and carry the heated water, which is either naturally heated orfuel heated, down towards the pool floor 16. The natural phenomenon ofheat rising facilitates a more uniform heating of the pool water therebyproviding a more comfortable swimming environment as a result of thesystem of the invention.

The second zone, Zone B, comprises a plurality of pop-up nozzles, one ofwhich is shown at reference numeral 20 in FIGS. 4 and 5. With referenceto FIGS. 4 and 5, pop-up nozzle 20 is a non-rotating pop-up nozzle.Pop-up nozzle 20 comprises a pop-up head 22, a concentric collar member24, a nozzle housing 26 which includes a conduit 26 a, and a key (notshown) for preventing pop-up head 22 from rotating. Pop-up head 22 isretained in nozzle housing 26 via concentric collar member 24, which, inturn is secured to a concentric ledge 28 of nozzle housing 26 via aplurality of screw fasteners 30. Pop-up head 22 moves up and down withinnozzle housing 26 by the delivery and removal of the re-circulatedwater. When water is not being delivered into conduit 26 a of pop-upnozzle 20, then pop-up head 22 remains flush with the swimming poolfloor 16 or moves downwardly into pool floor 16. Referring to FIG. 5,pop-up head 22 has a cross-sectional L-shaped configuration. When wateris delivered into conduit 26 a of pop-up nozzle 20, pop-up head 22 ismoved upwardly with the concentric lower portion of pop-up head 22engaging the lower surface of concentric collar member 24. Referring toFIG. 4, pop-up head 22 comprises two tangential openings 22 a eachdelivering a forced water flow.

With reference to FIG. 1, pop-up nozzles 20 are strategically located inthe pool floor 16 so that they can continue the direction of the flow ofwater created by the forced water flows 14 from nozzles 12 of Zone Atowards the main pool drain 18. Pop-up nozzles 20 are fixed, that is,they do not rotate. However, pop-up nozzles 20 are positioned in floor16 so that their tangential openings 22 a are positioned to face towardsthe main drain 18. An example of a non-rotatable pop-up nozzle which maybe suitable for the invention is a PCC fixed nozzle, Part Number004552502401 available from Paramount Pool and Spa Products, a divisionof Paramount Leisure Industries, Inc. These non-rotatable pop-up nozzles20 differ from the pop-up nozzles of the prior art in that the pop-upnozzles of the prior art generally rotate. Pop-up nozzles 20 of Zone Bensure that the dirt and debris in the water flow continue to be movedtowards the main pool drain 18 as shown by the enlarged arrowsgenerating from nozzles 20 (FIG. 1).

In general, the rotatable pop-up nozzles of the prior art may rotate 180or 360 degrees. This causes the dirt and debris to be re-suspended inthe pool water and requires the use of a surface skimmer and/or the maindrain to remove the re-suspended dirt and/or debris particles. In afurther embodiment of the invention, nozzles 20 of Zone B are rotatingnozzles. However, these rotating nozzles would be structured to notrotate any greater than about 90 degrees allowing for the continuationof the water flow towards the main drain 18.

Referring again to FIG. 1, operation of nozzles 12 of Zone A and nozzles20 of Zone B preferably is accomplished via a water recirculation system34 comprising water delivery conduits 36 connected to nozzles 12 andwater delivery conduits 37 connected to nozzles 20, a water returnconduit 40 connected to main drain 18, a variable speed pump 42, a valvedevice 44, and a filter system 46. Valve device 44 is shown in FIG. 1with dotted lines to water delivery conduits 36 of nozzles 12 and waterdelivery conduit 37 of nozzles 20 to indicate that valve device 44 islocated in close proximity to conduits 36 and 37 for delivering waterthereto. Valve device 44 may be a water distribution valve which mayinclude a valve actuator or valve device 44 may be a standard valvewhich may include a valve actuator. A water distribution valve may beused if more than two zones of nozzles are employed in pool 10. Astandard valve may be used if water is being distributed to either ZoneA or Zone B or to both Zones A and B. If Recirculation system 34operates in a manner well known to those skilled in the art. That is,water from main drain 18 is suctioned into the recirculation system 34,is filtered, and then is returned to the pool 10 via the water deliveryconduits 36, 37 to nozzles 12 and 20. The variable speed pump 42 mayhave 2, 3 or 4 speeds. An example of a variable speed pump which may besuitable for the recirculation system 34 of the invention is a JandyePump, Part Number JEP1.5, available from Zodiac Pool Systems, Inc. Anexample of a water distribution valve which may be suitable in theinvention is a PCC water valve, available from Paramount Pool and SpaProducts, a division of Paramount Leisure Industries, Inc. An example ofa filter system which may be suitable for the invention is adiatomaceous earth filter, Part Number DEV48, available from Zodiac PoolSystems, Inc. An example of a valve actuator which may be suitable inthe invention is a Jandy valve actuator, Part Number 4424, availablefrom Zodiac Pool Systems, Inc.

The invention comprises a variable speed pump 42 (FIG. 1) for deliveringpressurized water to nozzles 12 of Zone A and nozzles 20 of Zone B. Avariable speed pump allows for the different nozzle zones A and B ofswimming pool 10 to be utilized at different water flow rates. Thismeans that nozzles 12 of Zone A may be operated at different waterpressures which, in general, would be a fraction of the pressurerequired for the pop-up nozzles of the prior art which are generallypositioned in the walls of the swimming pool, thereby now allowing aswimming pool to be designed to comply with impending new lawscontemplated in the swimming pool industry. Additionally, pop-up nozzles20 of Zone B may be utilized as necessary in order to augment the watercirculation system of Zone A, thereby resulting in a more efficientwater circulation and water and pool cleaning system. Prior art poolwater circulation and cleaning systems only allow for one or the othertype of system, that is, these other systems only provide a circulationsystem or a cleaning system and not both.

As disclosed herein above, the re-circulated water is distributed to thestationary wall return nozzles 12 and the pop-up floor head nozzles 20by means of either a water distribution valve or a standard valve,allowing for a lower flow rate and a smaller sized pump to be utilized,thereby complying with the new laws recently adopted in Florida andCalifornia for recirculation pumps.

In addition to an efficient system and method for removing dirt anddebris from swimming pool 10, the system and method of the presentinvention also allows for a more efficient means of chemically treatingand heating the pool water. Returning the chemicals to water returnnozzles 12 and nozzles 20 which direct the flow of the water throughoutthe pool will provide a more effective distribution of the chemicals andwill help to eliminate “dead spots”, which can be defined as areas whereno water or a limited amount of water flows thereby resulting in theformation of algae and/or the accumulation of dirt and/or debris.Likewise, returning newly heated water, including solar heated surfacewater, to return nozzles 12 that direct the flow of water towards thefloor 16 of the pool 10, utilizes the natural method of heat rising toincrease the efficiency of the heating process, as was explained hereinabove.

Even though pop-up nozzles 12 of Zone A have been described as beingnon-rotating nozzles, in some embodiments nozzles 12 may be rotatingnozzles; however, rotation will not be greater than about 90 degrees.Additionally, in larger swimming pools, it may be necessary to utilizeadditional water valves to create multiple sub-zones within each Zone Aand B. A predetermined number of nozzles 12 in walls 13 may be operatedin Zone A and a predetermined number of nozzles 20 in floor 16 may beoperated in Zone B.

The nozzles of Zones A and B could be operated simultaneously or theycould be operated sequentially. In an embodiment of the invention, for asequential operation of the nozzles of Zone A and B, the stationary wallnozzles of Zone A would run about 75% of the time for a watercirculation and cleaning process and then be discontinued with thepop-up floor return nozzles of Zone B then running the last 25% of thewater circulation and cleaning process. In a further embodiment of theinvention, for a simultaneous operation of the nozzles of Zones A and B,stationary wall nozzles of Zone A would run about 100% of the time for awater circulation and cleaning process with the nozzles of Zone B onlyrunning about 25% of the process. In a still further embodiment of theinvention, both nozzles of Zone A and B can be operated simultaneouslyduring the entire water circulation and cleaning process. It is apparentthat several operational procedures of the nozzles of Zone A and Zone Bvia the valve device 44 and the variable speed pump 42 are available forthe water circulation and cleaning process of the invention.

Since a variable speed pump is used in the system 34 of the invention,the nozzles 12 of Zone A and the nozzles 20 of Zone B can be operated ata lower water pressure, a lower flow rate and less electrical energycompared to the nozzles employed in the circulating and/or cleaningsystems of the prior art. Additionally, nozzles 12 and 20 aresubstantially less expensive to manufacture, resulting in a morereasonable expense for the consumer compared to the nozzles of the priorart, such as rotating pop-up nozzles which generally rotate greater than90 degrees, i.e. 180 to 360 degrees, and which prior art rotatingnozzles generally are located along the swimming pool walls or floor.

While the present invention has been described in connection with apreferred embodiment of the figure, it is to be understood that othersimilar embodiments may be used or modifications and additions may bemade to the described embodiment for performing the same function of thepresent invention without deviating there from. Accordingly, it isintended by the appended claims to cover all such changes andmodifications as come within the spirit and scope of the invention.

1. A swimming pool circulation and cleaning system, comprising: at leasta first zone located in the wall of a swimming pool and comprising aplurality of stationary wall inlet nozzles, each stationary wall inletnozzle including at least one tangential opening for delivering a forcedwater flow in a downward direction toward the pool floor; and at least asecond zone located in the floor of the swimming pool and comprising aplurality of pop-up nozzles, each pop-up nozzle having at least onetangential opening for delivering a forced water flow along the floor tocontinue the direction of the forced water flow from each wall inletnozzle towards the main pool drain.
 2. The system of claim 1, furthercomprising a water recirculation system for selectively operating thestationary wall inlet nozzles of the first zone and the pop-up nozzlesof the second zone in a sequential manner or in a simultaneous manner.3. The system of claim 2, wherein the water recirculation systemcomprises a variable speed pump and a valve device for operating thestationary wall inlet nozzles and the pop-up nozzles in a sequential orsimultaneous manner.
 4. The system of claim 2, wherein the waterrecirculation system comprises a variable speed pump and a waterdistribution valve for operating the stationary wall inlet nozzles andthe pop-up nozzles in a sequential or simultaneous manner.
 5. The systemof claim 1, wherein the pop-up nozzles are non-rotating pop-up nozzles.6. The system of claim 1, wherein the pop-up nozzles are rotatingpop-nozzles.
 7. The system of claim 5, wherein the rotating pop-upnozzles rotate at about 90 degrees or less.
 8. The system of claim 1,wherein at least the first zone of stationary wall inlet nozzlescomprises at least one row of stationary wall inlet nozzles around thewall of the swimming pool.
 9. The system of claim 1, wherein at leastthe second zone of pop-up nozzles comprises at least one row of pop-upnozzles along the floor of the swimming pool.
 10. A method forcirculating water and cleaning a swimming pool, comprising:strategically locating at least a first zone in the walls of theswimming pool comprising a plurality of stationary wall inlet nozzles,each stationary wall inlet nozzle including at least one tangentialopening for delivering a forced water flow in a downward directiontoward the pool floor; strategically locating at least a second zone inthe floor of the swimming pool comprising a plurality of pop-up nozzles,each pop-up nozzle having at least one tangential opening for deliveringa forced water flow along the floor to continue the direction of theforced water flow from each stationary wall inlet nozzle towards themain pool drain; providing a water recirculation system in associationwith the stationary wall inlet nozzles of the first zone and the pop-upnozzles of the second zone; and selectively operating the waterrecirculation system for supplying water to the stationary wall inletnozzles and to the pop-up nozzles either sequentially or simultaneously.11. The method of claim 10, further comprising: providing non-rotatingpop-up nozzles in the second zone.
 12. The method of claim 10, furthercomprising: providing rotating pop-up nozzles in the second zone. 13.The method of claim 12, wherein the rotating pop-up nozzles rotate nogreater than 90 degrees.
 14. The method of claim 10, the steps furthercomprising: providing at least one row of the stationary wall inletnozzles around the walls of the swimming pool.
 15. The method of claim10, the steps further comprising: providing at least one row of thepop-up nozzles along the floor of the swimming pool.